Effects of acibenzolar-s-methyl and ethirimol on the composition of a laboratory population of barley powdery mildew.

abstract：:ABSTRACT Barley has two flowering types, chasmogamous (open-flowering) and cleistogamous (closed-flowering). We examined the effect of the timing of Fusarium graminearum infection on Fusarium head blight (FHB) and mycotoxin accumulation in barley cultivars with different flowering types using greenhouse experiments. I...

journal_title：Phytopathology

authors： Yoshida M,Kawada N,Nakajima T

更新日期：2007-09-01 00:00:00

abstract：:ABSTRACT Fusarium head blight (FHB) is a devastating disease that causes significant reductions in yield and quality in wheat and barley. Barley grains infected with deoxynivalenol (DON), a vomitoxin produced by Fusarium graminearum, are rejected for malting and brewing. Among six-rowed barley cultivars tested thus fa...

journal_title：Phytopathology

authors： Ma Z,Steffenson BJ,Prom LK,Lapitan NL

更新日期：2000-10-01 00:00:00

abstract：:Cyclophilins (EC 5.2.1.8) belong to a subgroup of proteins known as immunophilins, which also include FK506-binding proteins and parvulins. Members of the immunophilins have two main characteristic properties: (i) peptidyl-prolyl cis-trans isomerase activity and (ii) the ability to bind immunosuppressant molecules of ...

journal_title：Phytopathology

authors： Singh K,Winter M,Zouhar M,Ryšánek P

更新日期：2018-01-01 00:00:00

abstract：:ABSTRACT Tomato race 3 (T3) strains of Xanthomonas campestris pv. vesicatoria are antagonistic in vitro to tomato race 1 (T1) strains of the bacterium. All T1 strains and 11 strains of other X. campestris pathovars tested were inhibited by T3 strains. Sensitivity of tomato race 2 (T2) strains was variable. No strains ...

journal_title：Phytopathology

authors： Tudor-Nelson SM,Minsavage GV,Stall RE,Jones JB

更新日期：2003-11-01 00:00:00

abstract：:Scleromitrula shiraiana causes the popcorn disease in mulberry trees resulting in severe economic losses. Previous studies have shown that melanin may play a vital role in establishing the pathogenicity of fungi. In the present study, we identified the melanin produced in S. shiraiana belongs to DHN melanin by gas chr...

journal_title：Phytopathology

authors： Lǚ Z,Kang X,Xiang Z,He N

更新日期：2017-03-01 00:00:00

abstract：:ABSTRACT Sweet pepper-Leveillula taurica microclimate relations were studied under controlled conditions and in commercial greenhouses. Conidial germination occurred at 10 to 37 degrees C and was optimal at 20 degrees C. Conidial viability declined as temperatures increased to 40 degrees C for 6 h. Leaf colonization w...

journal_title：Phytopathology

authors： Elad Y,Messika Y,Brand M,David DR,Sztejnberg A

更新日期：2007-07-01 00:00:00

abstract：:Seiridium cardinale is the pathogenic fungus of unknown origin responsible for a world pandemic known as cypress canker affecting several species of Cupressaceae in both the Northern and Southern Hemisphere. In this study, a comparative genetic analysis of worldwide populations was performed using sequence analysis of...

journal_title：Phytopathology

authors： Della Rocca G,Eyre CA,Danti R,Garbelotto M

更新日期：2011-12-01 00:00:00

abstract：:Rice sheath blight (ShB), caused by the soilborne pathogen Rhizoctonia solani, annually causes severe losses in yield and quality in many rice production areas worldwide. Jasmine 85 is an indica cultivar that has proven to have a high level of resistance to this pathogen. The objective of this study was to determine t...

journal_title：Phytopathology

authors： Liu G,Jia Y,Correa-Victoria FJ,Prado GA,Yeater KM,McClung A,Correll JC

更新日期：2009-09-01 00:00:00

abstract：:This study investigated the effect of silicon (Si) on the photosynthetic gas exchange parameters (net CO2 assimilation rate [A], stomatal conductance to water vapor [gs], internal CO2 concentration [Ci], and transpiration rate [E]) and chlorophyll fluorescence a parameters (maximum quantum quenching [Fv/Fm and Fv'/Fm'...

journal_title：Phytopathology

authors： Perez CE,Rodrigues FÁ,Moreira WR,DaMatta FM

更新日期：2014-02-01 00:00:00

abstract：:The role of Grapevine Pinot gris virus (GPGV) in the etiology of grapevine leaf mottling and deformation was investigated by biological and molecular assays. A survey on different cultivars from the Trentino Region in Italy showed a widespread distribution of GPGV, which was associated with symptomatic (79%) but also ...

journal_title：Phytopathology

authors： Saldarelli P,Giampetruzzi A,Morelli M,Malossini U,Pirolo C,Bianchedi P,Gualandri V

更新日期：2015-04-01 00:00:00

abstract：:ABSTRACT Strains of Xylella fastidiosa, isolated from sweet orange trees (Citrus sinensis) and coffee trees (Coffea arabica) with symptoms of citrus variegated chlorosis and Requeima do Café, respectively, were indistinguishable based on repetitive extragenic palindromic polymerase chain reaction (PCR) and enterobacte...

journal_title：Phytopathology

authors： Qin X,Miranda VS,Machado MA,Lemos EG,Hartung JS

更新日期：2001-06-01 00:00:00

abstract：:Developing oat cultivars with partial resistance to crown rust would be beneficial and cost-effective for disease management. Two recombinant inbred-line populations were generated by crossing the susceptible cultivar Provena with two partially resistant sources, CDC Boyer and breeding line 94197A1-9-2-2-2-5. A third ...

journal_title：Phytopathology

authors： Babiker EM,Gordon TC,Jackson EW,Chao S,Harrison SA,Carson ML,Obert DE,Bonman JM

更新日期：2015-02-01 00:00:00

abstract：:ABSTRACT Genes for copper resistance, located on the chromosome of strain XvP26 of Xanthomonas axonopodis pv. vesicatoria, were transferred by conjugation to a recipient strain of the bacterium. The chromosomal gene transfer was verified by analyses of the genomes of donor, recipient, and putative transconjugants for ...

journal_title：Phytopathology

authors： Basim H,Stall RE,Minsavage GV,Jones JB

更新日期：1999-11-01 00:00:00

abstract：:In this study, spatial analyses were conducted at three different scales to better understand the epidemiology of rice blast, a major rice disease caused by Magnaporthe oryzae. At the regional scale, across the major rice production regions in China, rice blast incidence was monitored on 101 dates at 193 stations from...

journal_title：Phytopathology

authors： Guo F,Chen X,Lu M,Yang L,Wang S,Wu BM

更新日期：2018-11-01 00:00:00

abstract：:Grapevine downy mildew (GDM) is a severe disease of grapevines. Because of the lack of reliable information about the dates of GDM symptom onset, many vine growers begin fungicide treatments early in the season. We evaluate the extent to which such preventive treatments are justified. Observational data for 266 untrea...

journal_title：Phytopathology

authors： Chen M,Brun F,Raynal M,Makowski D

更新日期：2019-05-01 00:00:00

abstract：:Before 1991, Xanthomonas euvesicatoria (Xe) was the causal agent of bacterial spot of tomato in Florida but was quickly replaced by Xanthomonas perforans (Xp). The Xp population has changed in genotype and phenotype despite lack of a clear selection pressure. To determine the current Xanthomonas population in Florida,...

journal_title：Phytopathology

authors： Klein-Gordon J,Xing Y,Garrett KA,Abrahamian P,Paret ML,Minsavage GV,Strayer-Scherer AL,Fulton J,Timilsina S,Jones JB,Goss EM,Vallad GE

更新日期：2020-10-13 00:00:00

abstract：:Vitis rupestris B38 is a North American grapevine resistant to the major pathogen of cultivated grapevines, Erysiphe necator. Sources of powdery mildew resistance, like V. rotundifolia, are widely used in grape breeding but are already threatened, even before commercialization, by isolates that can reproduce on Run1 a...

journal_title：Phytopathology

authors： Barba P,Cadle-Davidson L,Galarneau E,Reisch B

更新日期：2015-08-01 00:00:00

abstract：:ABSTRACT Plant pathogens often exhibit variation in virulence, the ability to cause disease on host plants with specific resistance, evident from the diversity of races observed within pathogen species. The evolution of races in asexual fungal pathogens has been hypothesized to occur in a stepwise fashion, in which mu...

journal_title：Phytopathology

authors： Del Mar Jiménez-Gasco M,Milgroom MG,Jiménez-Díaz RM

更新日期：2004-03-01 00:00:00

abstract：:ABSTRACT Meta-analysis is a set of statistical procedures for synthesizing research results from a number of different studies. An estimate of a statistical effect, such as the difference in disease severity for plants with or without a management treatment, is collected from each study along with a measure of the var...

journal_title：Phytopathology

authors： Rosenberg MS,Garrett KA,Su Z,Bowden RL

更新日期：2004-09-01 00:00:00

abstract：:ABSTRACT Root-knot nematodes of the genus Meloidogyne are economically important pathogens of a wide range of crops. The tomato resistance gene Mi typically confers resistance to the three major species, M. incognita, M. javanica, and M. arenaria. However, virulent populations completely overcoming the Mi resistance s...

journal_title：Phytopathology

authors： Xu J,Narabu T,Mizukubo T,Hibi T

更新日期：2001-04-01 00:00:00

abstract：:ABSTRACT Restriction fragment length polymorphisms (RFLPs) were used to characterize the genetic structures of three field populations of Phaeosphaeria nodorum from Texas, Oregon, and Switzerland. Data from seven nuclear RFLP loci were used to estimate gene diversity and genetic distances and to make indirect measures...

journal_title：Phytopathology

authors： Keller SM,McDermott JM,Pettway RE,Wolfe MS,McDonald BA

更新日期：1997-03-01 00:00:00

abstract：:Huanglongbing (HLB) or greening currently is the most devastating citrus disease worldwide. The fastidious phloem-colonizing bacterium 'Candidatus Liberibacter asiaticus' (CLas) is the causal agent of citrus HLB in Florida. Bactericides containing the active ingredient oxytetracycline (OTC) have been used in foliar sp...

journal_title：Phytopathology

authors： Li J,Pang Z,Duan S,Lee D,Kolbasov VG,Wang N

更新日期：2019-12-01 00:00:00

abstract：:Asymptomatic plant colonization is hypothesized to enhance persistence of pathogenic forms of Fusarium oxysporum. However, a correlation between pathogen populations on living, asymptomatic plant tissues and soilborne populations after tillage has not been demonstrated. Living and dead tissues of broccoli, lettuce, sp...

journal_title：Phytopathology

authors： Henry PM,Pastrana AM,Leveau JHJ,Gordon TR

更新日期：2019-05-01 00:00:00

abstract：:ABSTRACT Multivariate random-effects meta-analyses were conducted on 12 years of data from 14 U.S. states to determine the mean yield and test-weight responses of wheat to treatment with propiconazole, prothioconazole, tebuconazole, metconazole, and prothioconazole+tebuconazole. All fungicides led to a significant inc...

journal_title：Phytopathology

authors： Paul PA,McMullen MP,Hershman DE,Madden LV

更新日期：2010-02-01 00:00:00

abstract：:ABSTRACT An experiment was designed to compare cycles of selection of four maize genotypes for ear- and grain-quality characteristics, interactions with Aspergillus flavus and Fusarium verticillioides infection, and insect ear infestation in two seasons. Mean infection levels by A. flavus and F. verticillioides were s...

journal_title：Phytopathology

authors： Cardwell KF,Kling JG,Maziya-Dixon B,Bosque-Pérez NA

更新日期：2000-03-01 00:00:00

abstract：:For an ordinary least-squares regression model, the coefficient of determination (R2) describes the proportion (or percentage) of variance of the response variable explained by the model, and is a widely accepted summary measure of predictive power. A number of R2-analogues are available as summary measures of predict...

journal_title：Phytopathology

authors： Hughes G,Choudhury RA,McRoberts N

更新日期：2019-05-01 00:00:00

abstract：:ABSTRACT Poplar leaf rust caused by Melampsora medusae f. sp. deltoidae is a widespread disease in North America, where epidemics occur within zones of sympatry and allopatry of telial hosts (Populus spp.) and aecial hosts (Larix spp.). To test the hypothesis that epidemics originate in the zone of sympatry where the ...

journal_title：Phytopathology

authors： Bourassa M,Bernier L,Hamelin RC

更新日期：2007-05-01 00:00:00

abstract：:ABSTRACT Relationships between disease incidence measured at two levels in a spatial hierarchy are derived. These relationships are based on the properties of the binomial distribution, the beta-binomial distribution, and an empirical power-law relationship that relates observed variance to theoretical binomial varian...

journal_title：Phytopathology

authors： Hughes G,McRoberts N,Madden LV,Gottwald TR

更新日期：1997-05-01 00:00:00

abstract：:ABSTRACT Striga aspera and S. hermonthica are sympatric in Africa. Each may serve as virulent gene reservoirs for the other if they hybridize and their hybrids are virulent and fertile. Intraspecific and interspecific crosses were made within and between the species, and reproductive success was determined. Freshly ha...

journal_title：Phytopathology

authors： Aigbokhan EI,Berner DK,Musselman LJ

更新日期：1998-06-01 00:00:00

abstract：:An outbreak of a new disease occurred in cotton (Gossypium hirsutum) fields in northwest Argentina starting in the 2009-10 growing season and is still spreading steadily. The characteristic symptoms of the disease included slight leaf rolling and a bushy phenotype in the upper part of the plant. In this study, we dete...

journal_title：Phytopathology

authors： Agrofoglio YC,Delfosse VC,Casse MF,Hopp HE,Kresic IB,Distéfano AJ

更新日期：2017-03-01 00:00:00